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1. 发明授权

US6055117A Systems and method having data encoded with edge placement equalization 失效
标题翻译：具有边缘放置均衡编码的数据的系统和方法
公开(公告)号：US6055117A
公开(公告)日：2000-04-25
申请号：US095005
申请日：1998-06-09
申请人： Lawrence A. Hansen , Charles B. Gamble , Ralph F. Simmons , Michael C. Allyn
发明人： Lawrence A. Hansen , Charles B. Gamble , Ralph F. Simmons , Michael C. Allyn
IPC分类号： G11B5/09
CPC分类号： G11B5/02 , G11B20/10212 , G11B20/10222 , G11B20/10407 , G11B20/10194 , G11B20/1426 , G11B2220/2508 , G11B2220/90
摘要： A data recording system includes media such as a magnetic disk or tape, a read/write head assembly, and a circuit that provides a write signal having edge placement equalization. The circuit responds to a binary serial data signal such as a run length limited signal of the type (1,x) and provides a write signal having data transitions corresponding to one of the two binary data values, the absence of a transition corresponding to the other data value. In addition, the write signal is provided with a pair of equalization transitions during periods of no data transitions. A first data transition is shifted away from the last provided equalization transition by a predetermined offset. A second data transition, provided immediately after the first data transition, may be shifted toward the last provided equalization transition. Timing of the data transitions is derived from a clock used to provide the equalization transitions.
摘要翻译：数据记录系统包括诸如磁盘或磁带的介质，读/写头组件和提供具有边缘放置均衡的写入信号的电路。电路响应二进制串行数据信号，例如类型（1，x）的游程长度限制信号，并提供具有对应于两个二进制数据值之一的数据转换的写入信号，不存在对应于其他数据值。此外，在没有数据转换的周期期间，写入信号被提供有一对均衡转换。第一数据转换从最后提供的均衡转换移位预定偏移。在第一数据转换之后立即提供的第二数据转换可以向最后提供的均衡转换移动。从用于提供均衡转换的时钟导出数据转换的定时。

2. 发明授权

US06385260B1 Asynchronous sampling digital detection (ASDD) methods and apparatus 失效
标题翻译：异步采样数字检测（ASDD）方法和装置
公开(公告)号：US06385260B1
公开(公告)日：2002-05-07
申请号：US09161049
申请日：1998-09-25
申请人： Charles B. Gamble , Uri Rogers
发明人： Charles B. Gamble , Uri Rogers
IPC分类号： H03D104
CPC分类号： H04L25/068 , G11B20/24
摘要： Asynchronous sampling digital detection (ASDD) methods and apparatus are described. In one embodiment, noise-corrupted information is received and comprises a plurality of information-carrying events which encode binary information which is desired to be retrieved. A plurality of values are extracted from the noise-corrupted information-carrying events which are representative of the encoded binary information. An amount of noise corruption carried by one of these plurality of values is estimated by considering an amount of noise corruption carried by another of the plurality of values. Responsive to the estimation of the noise corruption, the one value is then modified. In another embodiment, noise-corrupted information is received comprising a plurality of information-carrying events which encode binary information which is desired to be retrieved. A plurality of values from the noise-corrupted information-carrying events are determined which are representative of the encoded binary information. A set of conditions is defined which are a function of the plurality of values, and which have value-dependent outcomes. For a given determined value of the plurality of values, a value-dependent outcome is imposed to produce at least two intermediate noise-adjusted values. Using the two intermediate noise-adjusted values, a noise-reduced output value for the given determined value is selected.
摘要翻译：描述了异步采样数字检测（ASDD）方法和装置。在一个实施例中，接收到噪声损坏的信息，并且包括编码要被检索的二进制信息的多个信息携带事件。从代表编码的二进制信息的噪声损坏的信息携带事件中提取多个值。通过考虑多个值中的另一个所携带的噪声损坏的量来估计由这些多个值之一携带的噪声损耗量。响应于噪声损坏的估计，该值被修改。在另一个实施例中，接收到噪声损坏的信息，包括编码要被检索的二进制信息的多个信息携带事件。确定来自噪声破坏的信息携带事件的多个值代表编码的二进制信息。定义一组条件，这些条件是多个值的函数，并且具有依赖于价值的结果。对于给定的多个值的确定值，施加依赖于值的结果以产生至少两个中间噪声调整值。使用两个中间噪声调整值，选择给定确定值的噪声降低输出值。

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